Three Lakes Marathon is the 42.8km mountain marathon at Maraton Trzech Jezior 2026 (Międzybrodzie Bialskie, Poland). The race starts on September 19, 2026 at 08:00 AM. It starts in Międzybrodzie Bialskie and finishes in Porąbka stadium. The time limit is 10 h 30 min.
Hold a steady pace and save energy for every section.
The course climbs 2492m+. With 58m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 38% of the distance is uphill, 44% downhill and 18% flat. The longest climb runs 8.7km at an average 6.0% grade (527m of vertical). The longest descent runs 7.5km at an average 10.0% grade (745m of vertical). The steepest climb averages 30.9% over 0.4km. The steepest descent drops at 27.3% over 0.5km. Surface: 66% trail, 14% technical, 14% road, and 6% smooth. Flat-equivalent effort: 59.8 FlatKM.
Poles bring little benefit here: only about 8.1km of pole-friendly terrain.
Quad damage risk is moderate (index 34 of 100), with 30% of the load in the first half: 2 descents deserve a plan and a couple of downhill sessions before race day.
On race day, start temperatures have historically ranged from 7°C to 18°C, with around 13°C at the highest point; the chance of precipitation is about 36%. Heavy rain of 10.0mm or more falls on about 6% of days around this date.
293 finishers completed the 2026 edition. Men's winner: OLLÉ Marc BERNADES (Spain) in 3:48:46. Women's winner: Sylwia Byrska (Poland) in 4:45:59.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Three Lakes Marathon.
Other distances of Maraton Trzech Jezior 2026Rollercoaster 21 (21.6km)·Wallachian Shepherds Trail (17.0km)·Czupel Vertical 600 (3.5km)
Other editions of Three Lakes Marathon2027
Official websitewww.maraton3jezior.com/en